Nanosecond pulsed laser-generated stress effect inducing macro-micro-nano structures and surface topography evolution

Lu, Guoxin; Sokol, D. W.; Zhang, Yongkang; Dulaney, J. L.

doi:10.1016/j.apmt.2019.01.005

Cited by 30 publications

(14 citation statements)

References 46 publications

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“…To technically tune and characterize the surface morphology [ 65 ], we adjusted the scanning speed and space between the adjacent scanning lines of the UV-laser; see Figure 3 . In our tests, after increasing the scanning speed from 5 to 60 mm/s, the surface roughness of treated surface firstly decreased to the minimum (~2.57 µm) and then increased nearly linearly; see Figure 3 a.…”

Section: Resultsmentioning

confidence: 99%

Facile Fabrication of Self-Similar Hierarchical Micro-Nano Structures for Multifunctional Surfaces via Solvent-Assisted UV-Lasering

Zhang

Qin

et al. 2020

Micromachines

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Cross-scale self-similar hierarchical micro–nano structures in living systems often provide unique features on surfaces and serve as inspiration sources for artificial materials or devices. For instance, a highly self-similar structure often has a higher fractal dimension and, consequently, a larger active surface area; hence, it would have a super surface performance compared to its peer. However, artificial self-similar surfaces with hierarchical micro–nano structures and their application development have not yet received enough attention. Here, by introducing solvent-assisted UV-lasering, we establish an elegant approach to fabricate self-similar hierarchical micro–nano structures on silicon. The self-similar structure exhibits a super hydrophilicity, a high light absorbance (>90%) in an ultra-broad spectrum (200–2500 nm), and an extraordinarily high efficiency in heat transfer. Through further combinations with other techniques, such surfaces can be used for capillary assembling soft electronics, surface self-cleaning, and so on. Furthermore, such an approach can be transferred to other materials with minor modifications. For instance, by doping carbon in polymer matrix, a silicone surface with hierarchical micro–nano structures can be obtained. By selectively patterning such hierarchical structures, we obtained an ultra-high sensitivity bending sensor. We believe that such a fabrication technique of self-similar hierarchical micro–nano structures may encourage researchers to deeply explore the unique features of functional surfaces with such structures and to further discover their potentials in various applications in diverse directions.

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Section: Resultsmentioning

confidence: 99%

Facile Fabrication of Self-Similar Hierarchical Micro-Nano Structures for Multifunctional Surfaces via Solvent-Assisted UV-Lasering

Zhang

Qin

et al. 2020

Micromachines

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“…In addition, due to the difficulty in the preparation of absorbing layer with a designed shape and suitable thickness, the accuracy of the marking shape by LSM in size will be relatively lower than that by other methods [22,72]. However, with the stress effect generated by the laser plasma shock wave, the marking region by LSM can maintain super mechanical properties and higher fatigue life [22]. Figure 15.…”

Section: Laser Shock Markingmentioning

confidence: 99%

“…With the stress effect generated by laser-induced plasma shock wave, the metallic sheet is compressed into the underlying nanomold (Si mold) and attached to the substrate surface firmly [22,74,76]. Figure 17a shows the array of nanogears imprinted on cold-rolled aluminum foil, and the size of gear tooth (with the length of 300 nm, height of 50 nm, width of 200 nm and radius at tooth bottom of 50 nm) are significantly smaller than the original grain size of aluminum foil (1.4 mm).…”

Section: Laser Shock Imprintingmentioning

confidence: 99%

“…In addition, LSI has the ability to overcome the limitations of nanoforming and the nanoscale size effect of metallic materials. As a high-throughput 3D nanoscale imprinting technique, LSI has the ability to utilize the laser pulse to manufacture the nanoscale metal crystal structures on a 6-inch surface within 30 s, and has potential in the development of future electronics, optics, and sensing devices [22,74].…”

Section: Laser Shock Imprintingmentioning

confidence: 99%

“…For example, the 7075 Al alloy were treated by SP and LSP, the surface roughness of the SP-treated sample is 5.7 µm, while that of the LSP-treated sample is 1.1 µm [21]. Over decades of development, LSP has played an important part in the fields of aerospace manufacturing industry such as the extension of the fatigue life of vane-integrated disk and engine blades [22,23].…”

Section: Introductionmentioning

confidence: 99%

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The New Technologies Developed from Laser Shock Processing

Zhao

Qiao

et al. 2020

Materials

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Laser shock processing (LSP) is an advanced material surface hardening technology that can significantly improve mechanical properties and extend service life by using the stress effect generated by laser-induced plasma shock waves, which has been increasingly applied in the processing fields of metallic materials and alloys. With the rapidly development of modern industry, many new technologies developed from LSP have emerged, which broadens the application of LSP and enriches its technical theory. In this work, the technical theory of LSP was summarized, which consists of the fundamental principle of LSP and the laser-induced plasma shock wave. The new technologies, developed from LSP, are introduced in detail from the aspect of laser shock forming (LSF), warm laser shock processing (WLSP), laser shock marking (LSM) and laser shock imprinting (LSI). The common feature of LSP and these new technologies developed from LSP is the utilization of the laser-generated stress effects rather than the laser thermal effect. LSF is utilized to modify the curvature of metal sheet through the laser-induced high dynamic loading. The material strength and the stability of residual stress and micro-structures by WLSP treatment are higher than that by LSP treatment, due to WLSP combining the advantages of LSP, dynamic strain aging (DSA) and dynamic precipitation (DP). LSM is an effective method to obtain the visualized marks on the surface of metallic materials or alloys, and its critical aspect is the preparation of the absorbing layer with a designed shape and suitable thickness. At the high strain rates induced by LSP, LSI has the ability to complete the direct imprinting over the large-scale ultrasmooth complex 3D nanostructures arrays on the surface of crystalline metals. This work has important reference value and guiding significance for researchers to further understand the LSP theory and the new technologies developed from LSP.

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A method for obtaining the fraction of absorbed energy of material based on laser shock processing experiment and simulation

Zhao

Qiao

et al. 2021

Int J Adv Manuf Technol

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Nanosecond pulsed laser-generated stress effect inducing macro-micro-nano structures and surface topography evolution

Cited by 30 publications

References 46 publications

Facile Fabrication of Self-Similar Hierarchical Micro-Nano Structures for Multifunctional Surfaces via Solvent-Assisted UV-Lasering

Facile Fabrication of Self-Similar Hierarchical Micro-Nano Structures for Multifunctional Surfaces via Solvent-Assisted UV-Lasering

The New Technologies Developed from Laser Shock Processing

A method for obtaining the fraction of absorbed energy of material based on laser shock processing experiment and simulation

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